25-06-20, 09:50 AM
(25-06-20, 07:30 AM)moffmeister link Wrote: Gnasher - hauzitgaun?
All good my end mate thanks.
Quote:I drained coolant (it was pink - I'd done it when dropping the rad a couple of years ago to replace plugs - will be doing that again shortly..)
Coolant was pre-mixed (i.e. not solution +makeup water)
Everthing was/is clean - I flushed with Radflush and nothing - hoses and rad all clean internally
Looks like you opted for OAT or HOAT, and premix that shouldn't give you any problems and no suspended sediment. That could still point to a few blocked channels.
Quote:I was hence thinking an airlock?
It could still be just that mate. How much coolant are you getting in, is a real indicator? A few blocked channels will cause airlocks and reduce the cooling performance quite a bit and the difference can only be a few 100ml. The lack of free circulation will cause the trapped air to expand and effectively block a significant proportion of the rad and when they suffer this, it is like you say "just like switch".
Drain the whole system completely, release as many hoses as possible that sit at a bottom run and any others that could form traps. Now refill the system, after you've got it correctly filled/bled and been for a run wait until it's stone cold, check the expansion tank top up if required, check the rad cap level. How much have you got in compared to spec?
Later